earnheart



c. B. EARNHEART.

7 MB VALVE STRUCTURE. I APPLICATION FILED .IULYZB, 1918. I 1,305,266. Patented June 3,1919.

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' CHAUNGEY 2B. EARNI-IEART, 0T INDIANAPOLIS, INDIANA, Assrenon To SAFETY FIRST nnvrcns COMPANY, OFIILNDIANAPOEIQ,INDIANA, A CORPORATION or INDIANA.

IR-VAL E STRUCTURE. 1 I

TofaZZ whom it pamm:

:Be it knownthat onmncm B; Erm- HEART, acitizen of the United States, and a resident of Indianapolis, county of Marion,

.- and State of Indianahaveinvented certain ne -anduseful Air-Valve Structure, and Idohereby; declare that the followin is a full, clear, and exact description there- I of, referencefbeinghad .to the accompanying drawings, in which like numerals refer to like parts. 7 p 7 a This invention fre lates to air valves for-- pneumatic tires andthe like, especially those I having means for indicati ng'thean pressure within the tire, and isanfi nprovernent over thedevice shown in 'my'ffonn er' application,

provision of means cooperating "with the U v a the valve proper, sothat said part may have I casing or sleeve of the' valve structure forcing the valve firrnly nto engagement rotating movement ithereon but held against longitudinal 'rnovenient thereof,

1 a A 'further' 'fea'tureof the "invention is the provision: of a seal between the valve stem proper andthe casing therefor, and the parts' carrying the valve proper the casing.

A further featureof the lnvention is the provision of means for connecting a spirally wound tension spring .to the valve stern proper and to; the stern carryingthe valve a proper, sothat' s'aidvalve'niay have sulficient ,rnovement, independently oft the'sprifng, to open andrclose the port through the valve;

steinfwithout influencing thetension spring.

Other objects and advantages will be here inanerf nem fully set'forth; and ,p'ointed out injthe accompanying specification,

I In the accompanying,drawings'which are j the valve structure, lshowing the. parts-in closed position,andFig. 2is a similar view,

" M tt obenr fi A Specification of Letters Patent. ,Patented T 11193, 1919, Application nearing 26,1918. Serial no, 246,815.

Referring to the" drawings, 1 indicates the valve stem proper, which is providedat one end with a head 2 for engagement with parts of the pneumatictire (not shown), While the upper end portionof the valve. stein'is reduced and the end face thereof tapered to provide a se'at Bathe; valve stern having "a central boreft extending frorn' end to thereof and through thehead 2.

A portionof the body of the valve stem 1 is exteriorly threaded, as shown at 5, with which engage threads 6 in the end of a end sleeve 7, the interior of the sleeve 7 in'nme:

diate'ly abovethe threaded portions havin a tapered shoulder error enga ementwith a packing 9, of any suitablelrnaterial, said packing being-in the form of a ring, and entered in a peripheral recess 10 formed in the valve stem 1, the rear wallo'fthe' recess being likewise tapered coincident to the tapered shoulder 8, whereby the sleeve will have a wedging action against the packing.

Longitudinally movable in the opposite end of the sleeve 7 is a plunger 11 whic'n has a stem 12atits' inner end, and extending transversely th rojigh'the stem 12 at apoint distance beyond the inner end of the lplungar 11 is a port 13 with which eoinrnunic'atsa bore lft extending longitudinally oftheplun ger', the outer end of the bore '14 being enlarged to receive' 't'he usual form of check valve 15. The'eXtreine inner end otthe stem .12 is threaded into engagement with 'an ex tension 16, the inner end of which 18 pro-i vided with a socket 17 in which is placed any suitable form of packing '18, preferably of rubber, said packing being adapted to en gage'the seat 3 at the inner end of'the stem 1, and when pressed against said seat, to close'colnnrunication through the bore 4 and prevent the escape of'fiuid fronrthe valve stem. 7 p v a a a p The outerend of theplunge'r 1 1 projects a distance beyond the end of the sleeve and is eXteriorly threaded to receive an air pump attachment so that air inay b'epuinped through the valve structure, thezp'acking 18 being held firmly seated onth'e' inner end of the valve steni l, through the medium of a collar 19 which threadson to a 1ip'20 at the end of the sleeve 7 The collar 19 islfirst' turned over the threaded'portion of the plun-j gen 11, a prescribed distance, when theouter' end ofthe collar 19 is bent "inwardly toforln a ring 21 which fits in a groove 22 surround- 11 is provided with graduations 25 which V7 "21 entering the groove 22. This causes the plunger .11 and arts attached thereto, to

travel inwardly lar 19 is turned on to the lip 20 of the sleeve 7 and consequently forcesthe packing 1S ffirinly en the freeend of the colagainst the seat 3 at the inner end of V the valve stem 1..

-The plunger 11 is held against rotation Within the sleeve7 by providing a slot 23 "inlthe outer face'of the plunger in which travelsfafknob 24;," formed' on theinner face of the sleevef 7, "said knob also serving to limit the longitudinal movement of the plunger. HThel exterior face o-f'the plunger 1 are empl y d for indicating the pressure 1 within the tire -,or" otheri'device to which,

the valve structureis attached, said gradua "tions beingreadflasthey successively regis terwith the end of thejsleeve 7.

In orderto indicate correctly 3 1 having spirally arranged channels fsothat the spiral coils offthe spring 26 may. be turned thereon. f The band 27 is loosely mounted on the stem 12and is so arranged that the extension 16 can move away'i'rom the end of' thelvalve stem"1asufficient distance to permit fluid topass into or out off the bore in the valvestem before it directs pressure agalnst the band. Leakage around the plunger 11 is preventedby' introducing the valve stencils "Va-packing 28 within the sleeve 7 at the in- "ner' endof the plunger 11, said packing'be ing held vin position by means of a nut 29, V which threads onto the stem 12,"s aid pack ing 28 being beyond port13 so that the fluid entering or leaving the valve'structure will pass directly into the cavity" in V -the sleeve '7 and from thence V v into thebore l of .Inoperatingthis form of. device, a fluid the sleeve7 and thence through the bore 4:

into, theob iect to which the valvefstructure is I attached'f the 'pressure increases, the P 1 1 g 3 f rc p rdl -S wh 5 .9

through the'bore 4c."

the collar 19 is rotated to cause the threads 7 the amount 7 m, of pressure Within the tire or object to which the valve structure isattached, a spirally arrangedfs'pring 26 is introduced in the" sleeve 7 and attachedat one'end to the"i.n-. nerend of the valvestemjl, while the op 'posite end thereof isattached toa band 27 c surrounding the stem 12, between the end; of the extension 16 minis end o r-rue plun; ger I 11 proper, the exterior surface. of theband 27.and the inner end of the valve stem end of the tension spring'26 isjengaged with the band 27 andfthe'oppositefend then encessively register the graduating marlis 25 7 with the upper end of the sleeve 7, said graduations denoting the pounds pressure oftherfluid. 7 As soonasthe desired pressure is obtained, the plunger 11 is manually forced inwardly and the collar 19 threaded on to the lip 20, this action forcing the packing 18 against the seat 3 of the valve stem 1, thus completely closing communication V 75" At such time as itis desired to againireplenish the object towhich the valve strucp ture is attached', with fluid, the-collar '19 is" unscrewed from thelip, 20 so as to unseat the packing 18 from the'end ofithe valve" stern 1,fas shown in @Fig. 2, and it will be readily seen that so long asthe end'of the Y collar19 isresting againstthe end of the 'lipg 7 20, it will be impossible tolower the pab'ki ing 18 against its seat until s eh time as therein to engage the threads of th'e' lip.

' In assembling the parts-of the valve'strud 'ture together, the packing 28 and nut 29 or other securing means for thepacking: are introducedinto position after which the band 27 is slipped over'the stem 12 and the" "extension 16 carrying the packing then screwedon to the end ofthe stem 12. 7 "One gaged withthe end of the valvestenrli 2 The plunger 11 and partsatta'clhed there to are then introduced; into that 'GIldlOf the sleeve 7 containingthefthrea ds6 andmovedl 0O longitudinally throughsaid sleeve'until'the r threadsfeyon the valve steinwl, engage the" threads. 6 of the sleeve 7;""wheIl ti 6valve stem 1 'is rotatedto interlockjthe'threadse and 6- and iforce the packing9 againstthe 1 0 5' shoulder 8 of the sleeve. I V V then screwedonto the protruding endof j i the plunger '11 untiltheouterj end;thereof.

Th cbllar 19 is registers with the groove 22 in theperiphery of lthe plunger, after which the extremev H0 outer end of the collar isF-cr'iinped' inwardly Y i .to form'the ring21' which enterssaid groove. f T he valve structureis then readyto be ap 'plied to use. ;Byv iforming the valve fstruc-y ture inthis m'anner,-.the parts are'reduced lilai V to a minimum 7 so that the valve--' .struc-i 1 ture can be very cheaply constructed andtfar' f more, readily assembled, aiidjfurthermore' thecollarirestiiig upon ,the lip, when ithe' V collar'is'unscrew'ed therefrom, will form afi'zc 1 J positive support "for the plunger andiparts attached thereto, i which will prevent the? I j V is pumped 7 into" the upper end of the plun-; 'genill from whenceit passes downwardly through thecheck valve 1,5,bore 1%1, through 5 the 'port13 and thence intdthe opening, in

packing at the inner'endofthje e'zitension on;

the plunger from gengaging itsseat mini such time eeseller si fl rne Q1 fi -ee= 2 T The inventionrclaimedjisz. 1

stem, and a'sleeve attached to the valve stem, of a plunger slidably mounted in the sleeve, an inwardly extending stem on said plunger, said latter stem having a transverse port, and the plunger having a bore communicating therewith, a band loosely surrounding the plunger stem, a tensioning device having one of its ends secured to said valve stem and the opposite end to said band, and means on the plunger stem for expanding said tensioning device when the plunger is moved outwardly.

2. In a valve structure, a sleeve, a plunger longitudinally movable in said. sleeve, an exteriorly threaded stem integral with said plunger of less diameter than the diameter of said plunger and forming ashoulder at the meeting point between the plunger and stem, said plunger and a part of said stem having a longitudinal bore and the stem having a transverse bore therethrough communicating with the inner end of the longitudinal bore, a cup shaped packing having its horizontal portion surrounding said stem and its vertical portion resting against the inner wall of the sleeve, said transverse bore being below said packing and a nut threaded on to the stem and pressing the horizontal portion of the packing against said shoulder. 3. In a valve structure, the combination "with a valve stem, a plunger cooperating therewith, a stem carried by the plunger, an

extension carried by said plunger stem, and

a packing carried by the extension adapted loosely mounted on the plunger stem to which to control communication through the valve stem, of a tensioning springhaving one of it ends attached to the valve stem, andmeans the opposite end o'ffthe tensioning spring is attached, saidplunger stem having limited movement through said means whereby the packing may be engaged with or disengaged from its seat without affecting the tension of said spring.

, 4. In a valve structure, the'combination with a valve stem having a seat at 1ts lnner "end and a sleeve having a threaded lip 'at 7 Copies of this patent may be obtained for five cents each, by addressing the a Washington, I). G.

end of said collar being bent inwardly "and the inwardly bent portion entered into the groove in the plunger, whereby when the collar is turned on to the lip the plunger 7 that portion thereof adjacent the end of the sleeve having a groove of less diameter than the threaded portion, a collar having threads 7 on its inner end portion adapted to engage the threads of the lip to force the plunger inwardly, said collar having threads at its outer end portion of less diameter. than the diameter of the threads at the inner end portion, said second threads adapted to engage the threaded outer end of the plunger V and move inwardly. into registration with said groove when rotated, the outer end of said sleeve then being crimped inwardly and entered in said groove for rotatably mounting the collar on the plunger and holding the same against longitudinal movement thereof.

6. In a valve structure, the combination with a valve stem, and a plunger cooperating therewith, of a tensionspring having one of its ends attached to the valve stem, and means loosely mounted on the plunger. to which the opposite end of the tensionspring is attached. I

7 In a valve structure, the combination with a valve stem and a plunger cooperating therewith, of a tension spring having one of its ends attached to the valve stem, and means loosely mounted on the plunger to which the opposite end of the tension spring is attached, said plunger having limited movement through said loosely mounted means without affecting the tension of the 7 spring. V

In witnesswhereof I have hereunto'affixed my signature. 7 v r CHAUNOEY B. EARNHEART.

Commissioner of Patents, 

